Safety-strip for electric circuits



(No Model.)

' 0. B. SHALLENBERGER.

SAFETY STRIP FOR ELECTRIC GIROUITS.

No. 366,350. Patented July 12, 1887.

UNITED STATES PATENT OFFIcE.-

OLIVER B. SHALLENBERGER, OF ROCHESTER, ASSIGNOR TO GEORGE WESTINGHOUSE,JR, OF PITTSBURG, PENNSYLVANIA.

SAFETY-STRIP FOR ELECTRIC CIRCUITS SPECIFICATION forming part of LettersPatent No. 366,350, dated July 12, 1887,

Application filed January 1'7, 1887. Serial No. 224,521.

To all whom it may concern;

Be it known that I, OLIVER B. SHALLEN- BERGER, a citizen of the UnitedStates, residing in Rochester, in the county of Beaver and State ofPennsylvania, have invented certain new and useful Improvements inSafetyStrips for Electric Circuits, of which the following is aspecification.

The invention relates to the construction of safety-strips or fusibleplugs for electric circnits.

The object of the invention is to provide convenient means for replacingsafety-strips in electric circuits, in case they are burned out, Withouthaving to interrupt the connections with the bindingpost, to insure thatno injury shall be sustained by the person changing the strip.

The invention consists, generally, in placing the respective ends of thesafety-strip, which carry contact-springs, in suitable resilient clips,with which the normal circuit-connections are completed, and inemploying suitable tongs or clamps for holding a strip, designed tobeinserted in place of the one which may be destroyed, without having toloosen the binding-screws which are usually employed.

In the accompanying drawings, Figure 1 is a side view of a deviceembodying the features of the invention, and Fig. 2 is an end view ofthe same.

Referring to the figures, A represents a suitable base for supportingthe strips and placing (No model.)

them in circuit. This base carries two binding-plates, B and B". Theseplates are respectively constructed with spring-clips O and 0", eachconsisting of two springs, c c", which are designed to receivecontact'springs e and e of two clips, E and E secured to the respectiveends of a fusible strip, E. The springs e e are preferably of brass, andare placed in good electrical connection with the fusible strip byrivets or screws f f". The springs preferably bend outward and entercorresponding curved portions of the clips.

A pair of tongs or nippers, H, preferably provided with a handle ofinsulating material, is employed for holding the strips and thrustingthem into position between the clips when desired.

I claim as my invention-- 1. The combination, with a fusible strip, ofresilient contact-springs secured to the respective ends thereof.

2. The combination, with two binding-clips of resilient material, ofafusible strip and con tact-springs at the respective extremities of thesame, designed to make contact with the respective clips.

In testimony whereof I have hereunto subscribed my name this 7th day ofDecember, A. D. 1886.

OLIVER B. SHALLENBERGER.

Witnessesr WALTER D. UPTEGRAFF, OHARLEs A. TERRY.

